54 
A single specimen, a male, undoubtedly belonging to this species was found in the 
plankton collected with the HENsEN vertical net at Station 128, 700 metres to surface. 
Euchirella amoena appears to be only known from the Pacific Ocean. 
2. Euchirella hessec (Brady). 
Euchaeta hesset Brady, 1883, p. 63, pl. XXIII. 
Euchirella bella Giesbrecht, 1888, p. 336. 
Euchirella bella Giesbrecht, 1893, p. 233, pl. 15. 
Euchirella bella Giesbrecht & Schmeil, 1898, p. 35. 
Euchirélla rostrata Thompson & Scott, 1903, p. 244. 
Euchirella bella, var. indica Wolfenden, 1905 (a), p. 1006, pl. XCVI. 
This was the most common member of the genus in the plankton collected during the 
traverse of the ‘Siboga’, and was found at the following stations. 
Stat. 117°, I specimen. — Stat. 118 (HENSEN vertical net 900 metres to surface), 2 specimens. — 
Stat. 128 (HENSEN vertical net 700 metres to surface), 2 specimens. — Stat. 141 (HENSEN 
vertical net 1500 metres to surface), 12 specimens. — Stat. 142, 4 specimens. — Stat. 177%, 
4 specimens. — Stat. 185 (HENSEN vertical net 1536 metres to surface), 3 specimens. — 
Stat. 203 HENSEN vertical net 1500 metres to surface), 3 specimens. — Stat. 230 (HENSEN 
vertical net 2000 metres to surface), 1 specimen. — Stat. 252, 6 specimens. 
I regard the species described by Brapy in the ‘Challenger Report’ as Auchaeta hesset, 
and the figures given on Plate XXIII, to be identical with the form described by Grrsprecut 
as Euchirella bella. Bravy’s figure of the first joint of the basiopodite of the fourth pair of 
feet shews four spines, although he states ‘about five very broad and strong spines’ in the 
description. Fuchzrella rostrata has a row of six or seven triangular /amel/ae on the first joint 
of the basiopodite of the fourth pair of feet. Euchzrella hessez, with one exception, was obtained 
in plankton collected by the ‘Challenger’ in the Pacific Ocean. Gresprecur has recorded it from 
the Pacific Ocean only. Luchirella rostrata, with the exception of the record by Esrerty, is 
only known from the Mediterranean, and North Atlantic Ocean. The species recorded in the 
Ceylon Report by I. C. THompson and the present writer, from Stat. 21 (off Minikoi) and Stat. 
23 (Maldives to Gulf of Manaar), has proved on re-examination to be identical with Euchirclla 
bella, and therefore the same as Luchirella hessec (Brady). 
I find that the number of spines on the first joint of the basiopodite of the fourth pair 
of feet vary from three to four, instead of four, as stated by Gressrecut and Scumem. The 
two innermost spines apparently fuse in some cases and form one large spine, thus giving 
rise to three spines, one of which is decidedly larger than the others, instead of one large and 
three smaller spines. 
I see nothing to distinguish WoOLFENDEN’s variety zzdzca from the specimens collected by 
the ‘Siboga’. 
The form described by BRapy as the male of Euchaeta hessec and CLEvE’s male of Euche- 
rella rostrata (1900), both appear to be identical, but the fifth pair of feet is quite distinct 
from that of a true Luchirella. 
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